Question

four identical metallic objects carry the following charges: 1.6, 6.2, -4.8, and -9.4 μC. the objects are brought simultaneously into contact, so that each touches the others. then they are separated. what is the final charge on each object? how many electrons (or protons) make up the final charge on each object?

Answer 1

Add the charges: 1.6+6.2-4.8-9.4 microC.

divide by 4.
That is the charge on each.

Now, divide by the charge on an electron. That will be the number of excess electrons (if the charge was negative).